Improvement in hydraulic disks



v THOMAS SHAW.

lmEp'rovement in Hydraulic Disks.

7 NO. 1151365, Patented May 3;),1871.

THOMAS SHAW, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN HYDRAULIC D'lSKS,

Specification forming part of Letters Patent No. 115,365, dated May 30,1871.

To all whom it m a4 concerm Beuit known that I, THOMAS SHAW, of thecityand county of Philadelphia, Pennsylvania, have invented a new andImproved Steam i or HydraulicDisk for sustaining the end thrust ofheavy-laden revolving shafts; and I hereby declare thefollowin g to be afull, clear, and exact description of the same, reference being had tothe accompanying drawing and to the letters of reference marked thereon.

My invention consists in a hydraulic or steam disk for supportingheavily-laden revolving.

shafts, as will hereinafter be more fully set forth and described. a i IThe accompanying drawing represents a vertical section of my disk.

a represents a sectionof pipe, which is used when my. invention isapplied to a pump. I When used for other purposes this part may tendingupward for the support of the bed-- I plate 01. This bed-plate consistsof acircular plate, of any desired size, and which has a circulargroove,o,cutin its face, and an open-- ing through it so as to'connectthe groove, by

means of the pipe a, with a steam-boiler or forcing-pump. h is ashaft,t-o the lower end I of which 'is attached the revolving load, of

whatever kind. Secured to the shaft is a re volving disk, 9, which has adeep groove cut in its bottom, near the outer edge, for the re Iceptionof thepistoneg This piston, being of the shape; shown in thedrawing, isv provided with a common packing-ring, Z, and bears on thebed-plate until the pressure from the pump or steam-boiler reaches acertain limit. Screwed into the groove in the disk 9 is a circular ring,2', which,as the disk is being raised upward by the pressure frombeneath, catches underthe inwardly-projecting edge of the piston, and,as soon as the pressure exceeds a de; sired'lirnit, lifts the pistonfromits seat so as to let the surplus pressure escape into dome 7c, and fromthence through the pipe m; Between the ring i and piston 0 there is leftsufficient space to allow the pressure from the pipe at to bear downwardupon the top w of the piston so as to keep it pressed firmly upon thebed-plate d..

In order that the friction shall not be too great upon the face of thepiston as it revolves with the disk a larger bearing-surface is given tothe lower end of said piston.

It will be evident that the packing and location of piston can bevariously modified without any alteration in the result.

What I claim, and desire to secure by Letters Patent, is-

1. The revolving disk g, provided with an annular piston, e, and ring2', substantially as described.

2. In combination with the above, the grooved bed-plate d and pipe n,substantially as described.

THOMAS SHAW. '[L. s.] Witnesses:

J. G. ,MrroHELL, J NO. L. TIBNEY.

TENT Orr-Ion

